I stumbled across what is called the Double Bazooka Antenna. It’s a dipole, also known as the coaxial dipole, and it originated way back in the 1940s when MIT Engineers developed it for the US Gove...

A truly awesome QTH or portable antenna is the Off-Center Fed Dipole. These and variants have been long used by hams to get on the air with added gain. A true multi-band antenna you get 40M, 20M, 1...

The 9:1 UnUn. As a transmission line transformer, you don’t have to have exactly 9 trifilar turns. It depends on core type. The Fatty 43 core does well with only 6 trifilar turns. But regardless, t...

Autotransformer Recipe Table Ratio Turns Target Z Optimal Cap Why? Notes 36:1 2+12 ~1,800 Ω 120–150 pF (130 pF...

Field Notes on Experiments with 9:1 UnUn configurations. The goal is to get as many bands as possible closest to 3:1 SWR to be tunable with an internal rig tuner. Type 43 Cores Note...

I got the Anytone AT-778UV as a mobile rig for the Ham Mobile. It’s a fine enough radio, but programming it is about as intuitive as … programming a Chinese radio! Ug, it’s the worst. Here’s how to...

I came across the concept of Transmission Line Transformers (TLT). I hadn’t previously heard about them but there is an opus on the topic by silent key Jerry Sevick. I struggled really hard trying ...

The quest for the ultimate portable 2M Antenna is over. The 2M Moxon, designed by DL2MAN is where it’s at. He’s got a great YouTube video that explains the whole build. The Build Get your 3D Prin...

Salty Walt, K4OGO, had made a Vertical Dipole Antenna for his operations along the beach. I was thinking about making one for myself, with DX and POTA in mind. Just think, all the performance of a ...

I pretty much gave up on multi-banded EFHW antennas because the harmonic either didn’t work out or the efficiency was super poor. I set out to try and rectify that. I tried to build an EFHW that ha...